EP 0645062 A1 19950329 - COMPLEMENTARY MACROCELL FEEDBACK CIRCUIT.
Title (en)
COMPLEMENTARY MACROCELL FEEDBACK CIRCUIT.
Title (de)
KOMPLEMENTÄRE RÜSKKOPPLUNGSSCHALTUNGFÜR MAKROZELLE.
Title (fr)
CIRCUIT DE RETROACTION A MACRO-CELLULE COMPLEMENTAIRE.
Publication
Application
Priority
- US 9401726 W 19940302
- US 2721193 A 19930305
Abstract (en)
[origin: US5329181A] In a programmable logic device having I/O blocks and logic blocks, two lines leading from a region including a logic block and an I/O block alternately provide a logic block output signal and its complement or a logic block output signal and an I/O block input signal. A multiplexer selects between providing on a line leading from an I/O block to an interconnect structure a first signal which is provided by the I/O block when the I/O block is an input buffer and a second signal which is the inverse of a logic signal provided to the I/O block when the I/O block is not an input buffer. Thus in one case two lines which extend from the I/O block to the interconnect structure may carry a) a logic block output signal and b) an I/O block output signal; and in the other case carry a) a logic block output signal and b) the inverse of the logic block output signal.
IPC 1-7
IPC 8 full level
H03K 19/177 (2006.01)
CPC (source: EP US)
H03K 19/17704 (2013.01 - EP US); H03K 19/17744 (2013.01 - EP US)
Citation (search report)
See references of WO 9421046A1
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
US 5329181 A 19940712; EP 0645062 A1 19950329; JP H07506712 A 19950720; WO 9421046 A1 19940915
DOCDB simple family (application)
US 2721193 A 19930305; EP 94910702 A 19940302; JP 52000394 A 19940302; US 9401726 W 19940302